// Copyright 2025 Justine Alexandra Roberts Tunney
//
// Permission to use, copy, modify, and/or distribute this software for
// any purpose with or without fee is hereby granted, provided that the
// above copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
// WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
// DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
// PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

#include <dirent.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>

int main() {
  DIR *dir;
  struct dirent *ent;
  int found_dot = 0, found_dotdot = 0;
  char path[] = "/tmp/readdir_edge_test.XXXXXX";

  if (!mkdtemp(path))
    return 100;

  dir = opendir(path);
  if (!dir)
    return 1;

  while ((ent = readdir(dir)) != NULL) {
    if (strcmp(ent->d_name, ".") == 0)
      found_dot = 1;
    if (strcmp(ent->d_name, "..") == 0)
      found_dotdot = 1;
  }

  if (!found_dot)
    return 2;

  if (!found_dotdot)
    return 3;

  closedir(dir);

  remove(path);

  dir = opendir("/nonexistent/directory");
  if (dir != NULL)
    return 4;

  if (errno != ENOENT)
    return 5;

  return 0;
}
